第4题: [单项选择]We must ______ that the experiment is gong to be controlled as rigidly as possible. A. assure B. secure C. ensure D. endure 参考答案:C 答案解析:assure意为“使确信,使放心”,通常构成“assure sb. +that从句”或“assure sb. of”结构;secure意为“保证,保险”,通常不接从句;ensure意为“保证,确保”,
第6题: [单项选择]Workers want more money and shorter working hours to ______. A. enjoy themselves more after work B. produce greater work flow C. show their great abilities D. challenge the management 参考答案:A 答案解析:分析最后一段的倒数二,三句“钱让他们更能享受他们的闲暇时间。相似的看法也许能解释(他们为什么)要求更短的工作时间。 (即,工人们要求更短的工作时间也是为了更能享受他们的闲暇时间。)可知正确答案为A项。